Lubricator.



N. W. GUMMINS. LULBRICATOR.l APPLICATION FILED SEPT. 6, 1912.

INVENTOR` norman fummms Patented Aug. 12, 1913.

time the latter mail A. CORPORATION F CONNECTI- .application filedeptsmber', w12. Serial No. 7%.837 7.

To all lwhom it may concern:

. e it known that l, NORMAN YV. CUM- Mins, a citizen ott-he UnitedStates, resid ing in the city of Bridgeport, county of Fairfield, andState of Connecticut, have invented certain new and useful improvementsin `imbricators and l do declare the following to a ull, clear, andexact description of the invention, such as will enable others skilledin the art to which ity appertains to malte and use the same.

lli/ty invention relates to certain improvements in lubricators, butmore particularly has reference to that type o lubricators known` asgrease cups in which grease is contained within a suitable casing and isforced therefrom to the bearin to be lubricated by means oi a plungerevice.

The object of my improvement is to provide a device of this descriptionthat shall be exceedingly simple in construction and etl'ective inoperation, and with these ends in view my invention consists in thedetails of construction and hereinafter iully described and thenparticularl pointed out in the claims which concluce this description.

A preferred embodiment of the improved lubricator has been shown invertical section in the accompanying drawing.

Similar numerals of reference denote like parts in both figures of thedrawings.

l is a casing which is interiorly threaded as shown at 2 and terminatesat the bottom in a threaded nozzle 3 for attachment to any bearing to belubricated through which nozale the grease is forced to the bearing.

4 is a cap which rests upon the upper edge oi' the casing, and 5 is acover outside the cap and secured to the upper portion ot the casing inany suitable manner in the present instance by a rictional engagementtherewith, said cover serving to prevent displacement ot the cap i whileat the same is free to rotate.

6 is a stem which depends within the casing and is provided at the upperend immediately beyond the cover with a handle Y. This stem extendsfreely through the top of the cover 5 so as to be capable of freerotation and is provided with a collar 8 which rests on top of the coverand also with a collar 9 which extends immediately vbeneath the cap d sothat it will be clear that said stem is incapable of lengthwisemovecombination of parts `ger cup should revolve ment. This stem isrectangular in shape in cross section and vextends through arectangular'opening in the cap 4 so that l'the latter will partake ofthe rotary movements of the stem.

l0 is a plunger cup externally threaded and engaging the internalthreads of the casing l, said cup being inverted, and the rectangularstem 6 extends freely throughv a rectangular openingl in the centralportion of this cup, so that said cup Will partake of the rotarymovements of the stem but at the same time will be capable of freevlengthwise movements Contained within this cup is a packing 1l whichsnuglyembraces the stem 6 so as t0 act as a gasket to prevent the greasefrom working upward along the stem, bottom of the latter is slightlyenlarged as seen at 12 to prevent the cup 10 from leaving the stem. Thecasing immediately below the cup l0 is lled with grease, and as the stemis revolved and will travel progressively toward 'the bottom of thecasing thereby expelling 'the grease through the nozzle 3.

The cover 5 may be' readily removed and the parts withdrawn for thepurpose of tilling the cup. The cap 4 acts as a good bearing to steadythe movements of the stem, and in connection with the plunger cup willetectually prevent any wabbling of the.

stem.

Since it is merely necessary that the plunwith the Stem and should atthe same time have movements lengthwise thereof, it is not at allessential that the shape of the stem should be rectangular in crosssection, since it will be evident that so long as the stem isI not aplain cylinder the operation of the' parts will be the same as above setforth, andv therefore I do not wish to be limited in this respect.

By making the stem causing the plunger cup to revolve with the stem, thelatter will not be projected, after the manner of a piston rod, beyondthe top of the casing, and, moreover, I do away withY extra parts suchasV would be necessary ...if the stem were threaded and engaged with theplunger cup, because in such an instancev it would be necessary toprovide son means to prevent the rotation of such cup, the sole aim ofmy improvement being to provide an perfectly plain and along the stem.`

and the the cup will likewise revolve v ofthe casing, astem extendingthrough the :cap and cover and'into'the casing, they stem exceedinglysimple device with a minimum f vI claim yas new and desire to secure byLet- 1. A lubrcator kcomprising va.` casting. prof rvided rwith any openvupper end7 a cap rotatably seated on the open end of thefcasing, aCOVeIinclosing thev cap and friction-v v ally engaginggthe exterior ofthe open end being rotatable relative to the coverbut notyrotatable,relativetov thccap, ka. plunger carried by kthestern, acollar carried by the stem anda utting the inner'surfaceof the cap,l

and a second collar carried by tiwstenfl and abutting'the outer. surfaceof the cover.

threaded casing provided With an open upper end, a cap rotatablyr'seated'onthe o en upper endv of the cesing, vaeover ncloslng the-:cap,and rictionally vengaging; the outerL surface oi the open endy ofthecaslng, afs'tem extending ythrougdfi' vthe coverv and cap and.

rinto the casinggthe stem beingy rotatable tion krelative to theredbythe stemy Y v *Inv testimony whereof Ivaix my signature in presence oftwo Witnesses. l y NORMANWgCUMMINe y Wtnessesz -A f f 1 Ff.v XV. SMITH,Jr.,

M. T. LONGDEN.

2A lubrcator comprising an internaily relativeto' theco'ver and heldagainstr rotav f f kcap,l and @plunger car-vv c v v v

